/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_valuebound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 14:48:22,042 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 14:48:22,044 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 14:48:22,073 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 14:48:22,089 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 14:48:22,091 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 14:48:22,093 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 14:48:22,095 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 14:48:22,096 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 14:48:22,097 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 14:48:22,099 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 14:48:22,103 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 14:48:22,104 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 14:48:22,105 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 14:48:22,106 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 14:48:22,107 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 14:48:22,112 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 14:48:22,118 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 14:48:22,118 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 14:48:22,119 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 14:48:22,122 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2021-05-02 14:48:22,157 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 14:48:22,157 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 14:48:22,159 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 14:48:22,159 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 14:48:22,160 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 14:48:22,160 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 14:48:22,160 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 14:48:22,160 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 14:48:22,160 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 14:48:22,160 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 14:48:22,161 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 14:48:22,161 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 14:48:22,161 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 14:48:22,161 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 14:48:22,161 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 14:48:22,161 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 14:48:22,161 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 14:48:22,161 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 14:48:22,161 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 14:48:22,162 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 14:48:22,162 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 14:48:22,162 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 14:48:22,162 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 14:48:22,162 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 14:48:22,162 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 14:48:22,162 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 14:48:22,162 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 14:48:22,162 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 14:48:22,163 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 14:48:22,410 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 14:48:22,425 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 14:48:22,427 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 14:48:22,427 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 14:48:22,428 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 14:48:22,429 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_valuebound20.c [2021-05-02 14:48:22,476 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/099b724ab/de32f3517d87422c97d5fcc62fb454f3/FLAG22a842d85 [2021-05-02 14:48:22,791 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 14:48:22,791 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_valuebound20.c [2021-05-02 14:48:22,796 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/099b724ab/de32f3517d87422c97d5fcc62fb454f3/FLAG22a842d85 [2021-05-02 14:48:23,213 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/099b724ab/de32f3517d87422c97d5fcc62fb454f3 [2021-05-02 14:48:23,215 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 14:48:23,216 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 14:48:23,219 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 14:48:23,219 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 14:48:23,221 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 14:48:23,222 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 02:48:23" (1/1) ... [2021-05-02 14:48:23,223 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@742fa138 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:48:23, skipping insertion in model container [2021-05-02 14:48:23,223 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 02:48:23" (1/1) ... [2021-05-02 14:48:23,228 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 14:48:23,239 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 14:48:23,322 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_valuebound20.c[489,502] [2021-05-02 14:48:23,333 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 14:48:23,338 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 14:48:23,345 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_valuebound20.c[489,502] [2021-05-02 14:48:23,350 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 14:48:23,359 INFO L208 MainTranslator]: Completed translation [2021-05-02 14:48:23,359 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:48:23 WrapperNode [2021-05-02 14:48:23,360 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 14:48:23,360 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 14:48:23,360 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 14:48:23,360 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 14:48:23,396 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:48:23" (1/1) ... [2021-05-02 14:48:23,402 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:48:23" (1/1) ... [2021-05-02 14:48:23,415 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:48:23" (1/1) ... [2021-05-02 14:48:23,415 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:48:23" (1/1) ... [2021-05-02 14:48:23,425 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:48:23" (1/1) ... [2021-05-02 14:48:23,428 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:48:23" (1/1) ... [2021-05-02 14:48:23,434 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:48:23" (1/1) ... [2021-05-02 14:48:23,435 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 14:48:23,436 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 14:48:23,436 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 14:48:23,436 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 14:48:23,436 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:48:23" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 14:48:23,509 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 14:48:23,509 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 14:48:23,509 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 14:48:23,509 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 14:48:23,509 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 14:48:23,509 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 14:48:23,509 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 14:48:23,510 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 14:48:23,510 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 14:48:23,510 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 14:48:23,510 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 14:48:23,510 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 14:48:23,511 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 14:48:23,511 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 14:48:23,511 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 14:48:23,512 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 14:48:23,512 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 14:48:23,512 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 14:48:23,512 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 14:48:23,512 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 14:48:23,717 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 14:48:23,717 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 14:48:23,718 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 02:48:23 BoogieIcfgContainer [2021-05-02 14:48:23,718 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 14:48:23,719 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 14:48:23,719 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 14:48:23,721 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 14:48:23,721 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 02:48:23" (1/3) ... [2021-05-02 14:48:23,722 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5112263c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 02:48:23, skipping insertion in model container [2021-05-02 14:48:23,722 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:48:23" (2/3) ... [2021-05-02 14:48:23,722 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5112263c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 02:48:23, skipping insertion in model container [2021-05-02 14:48:23,722 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 02:48:23" (3/3) ... [2021-05-02 14:48:23,723 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd-ll_valuebound20.c [2021-05-02 14:48:23,727 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 14:48:23,729 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 14:48:23,739 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 14:48:23,756 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 14:48:23,756 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 14:48:23,756 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 14:48:23,756 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 14:48:23,756 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 14:48:23,756 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 14:48:23,756 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 14:48:23,756 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 14:48:23,767 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-02 14:48:23,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-02 14:48:23,770 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:48:23,771 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:48:23,771 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:48:23,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:48:23,774 INFO L82 PathProgramCache]: Analyzing trace with hash 870870740, now seen corresponding path program 1 times [2021-05-02 14:48:23,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:48:23,780 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461626895] [2021-05-02 14:48:23,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:48:23,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:48:23,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 14:48:23,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:48:23,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 14:48:23,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:48:23,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-02 14:48:23,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:48:23,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-02 14:48:23,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:48:23,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-02 14:48:23,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:48:23,936 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-02 14:48:23,937 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:48:23,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461626895] [2021-05-02 14:48:23,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461626895] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 14:48:23,937 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 14:48:23,938 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 14:48:23,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132251941] [2021-05-02 14:48:23,941 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 14:48:23,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:48:23,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 14:48:23,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 14:48:23,952 INFO L87 Difference]: Start difference. First operand has 37 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 14:48:24,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:48:24,117 INFO L93 Difference]: Finished difference Result 67 states and 105 transitions. [2021-05-02 14:48:24,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 14:48:24,119 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2021-05-02 14:48:24,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:48:24,123 INFO L225 Difference]: With dead ends: 67 [2021-05-02 14:48:24,124 INFO L226 Difference]: Without dead ends: 32 [2021-05-02 14:48:24,126 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 14:48:24,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-05-02 14:48:24,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-05-02 14:48:24,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 15 states have (on average 1.2) internal successors, (18), 16 states have internal predecessors, (18), 13 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 14:48:24,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2021-05-02 14:48:24,153 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 33 [2021-05-02 14:48:24,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:48:24,153 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2021-05-02 14:48:24,153 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 14:48:24,153 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2021-05-02 14:48:24,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-02 14:48:24,154 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:48:24,154 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:48:24,155 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 14:48:24,155 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:48:24,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:48:24,155 INFO L82 PathProgramCache]: Analyzing trace with hash -1006914976, now seen corresponding path program 1 times [2021-05-02 14:48:24,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:48:24,156 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079379485] [2021-05-02 14:48:24,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:48:24,170 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:48:24,171 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [189539437] [2021-05-02 14:48:24,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:48:24,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:48:24,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 14:48:24,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:48:24,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:24,387 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-02 14:48:24,387 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:48:24,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079379485] [2021-05-02 14:48:24,388 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:48:24,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189539437] [2021-05-02 14:48:24,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [189539437] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:48:24,388 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:48:24,388 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 14:48:24,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816409752] [2021-05-02 14:48:24,389 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 14:48:24,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:48:24,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 14:48:24,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-02 14:48:24,390 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-05-02 14:48:24,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:48:24,473 INFO L93 Difference]: Finished difference Result 48 states and 65 transitions. [2021-05-02 14:48:24,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 14:48:24,473 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 33 [2021-05-02 14:48:24,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:48:24,474 INFO L225 Difference]: With dead ends: 48 [2021-05-02 14:48:24,474 INFO L226 Difference]: Without dead ends: 46 [2021-05-02 14:48:24,475 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 35.8ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-02 14:48:24,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-05-02 14:48:24,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2021-05-02 14:48:24,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 23 states have internal predecessors, (26), 19 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-02 14:48:24,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 62 transitions. [2021-05-02 14:48:24,485 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 62 transitions. Word has length 33 [2021-05-02 14:48:24,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:48:24,485 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 62 transitions. [2021-05-02 14:48:24,485 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-05-02 14:48:24,485 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 62 transitions. [2021-05-02 14:48:24,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-02 14:48:24,486 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:48:24,486 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:48:24,705 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 14:48:24,705 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:48:24,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:48:24,706 INFO L82 PathProgramCache]: Analyzing trace with hash -124657161, now seen corresponding path program 1 times [2021-05-02 14:48:24,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:48:24,706 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771319931] [2021-05-02 14:48:24,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:48:24,719 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:48:24,719 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [766466199] [2021-05-02 14:48:24,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:48:24,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:48:24,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-02 14:48:24,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:48:24,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:24,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:24,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:24,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:24,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:24,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:24,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:24,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:24,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:24,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:24,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:24,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:24,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:24,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:24,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:24,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:24,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:24,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:24,982 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-02 14:48:24,983 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:48:24,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771319931] [2021-05-02 14:48:24,983 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:48:24,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766466199] [2021-05-02 14:48:24,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [766466199] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:48:24,983 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:48:24,983 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 14:48:24,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534310269] [2021-05-02 14:48:24,984 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 14:48:24,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:48:24,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 14:48:24,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-05-02 14:48:24,984 INFO L87 Difference]: Start difference. First operand 45 states and 62 transitions. Second operand has 10 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2021-05-02 14:48:25,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:48:25,113 INFO L93 Difference]: Finished difference Result 70 states and 102 transitions. [2021-05-02 14:48:25,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 14:48:25,113 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) Word has length 38 [2021-05-02 14:48:25,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:48:25,117 INFO L225 Difference]: With dead ends: 70 [2021-05-02 14:48:25,118 INFO L226 Difference]: Without dead ends: 68 [2021-05-02 14:48:25,119 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 66.7ms TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-05-02 14:48:25,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-05-02 14:48:25,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 61. [2021-05-02 14:48:25,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 30 states have (on average 1.3) internal successors, (39), 32 states have internal predecessors, (39), 25 states have call successors, (25), 6 states have call predecessors, (25), 5 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) [2021-05-02 14:48:25,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 87 transitions. [2021-05-02 14:48:25,132 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 87 transitions. Word has length 38 [2021-05-02 14:48:25,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:48:25,132 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 87 transitions. [2021-05-02 14:48:25,132 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2021-05-02 14:48:25,132 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 87 transitions. [2021-05-02 14:48:25,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-02 14:48:25,133 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:48:25,133 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:48:25,350 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:48:25,351 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:48:25,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:48:25,351 INFO L82 PathProgramCache]: Analyzing trace with hash 1732898944, now seen corresponding path program 1 times [2021-05-02 14:48:25,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:48:25,351 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332585615] [2021-05-02 14:48:25,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:48:25,366 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:48:25,366 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1194924589] [2021-05-02 14:48:25,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:48:25,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:48:25,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-02 14:48:25,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:48:25,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:25,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:25,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:25,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:25,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:25,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:25,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:25,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:25,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:25,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:25,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:25,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:25,540 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-02 14:48:25,540 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:48:25,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332585615] [2021-05-02 14:48:25,540 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:48:25,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194924589] [2021-05-02 14:48:25,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194924589] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:48:25,540 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:48:25,541 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 14:48:25,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986020471] [2021-05-02 14:48:25,541 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 14:48:25,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:48:25,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 14:48:25,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-02 14:48:25,542 INFO L87 Difference]: Start difference. First operand 61 states and 87 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-05-02 14:48:25,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:48:25,669 INFO L93 Difference]: Finished difference Result 68 states and 93 transitions. [2021-05-02 14:48:25,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 14:48:25,670 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 43 [2021-05-02 14:48:25,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:48:25,670 INFO L225 Difference]: With dead ends: 68 [2021-05-02 14:48:25,671 INFO L226 Difference]: Without dead ends: 64 [2021-05-02 14:48:25,671 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 45.0ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-02 14:48:25,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-05-02 14:48:25,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2021-05-02 14:48:25,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 35 states have internal predecessors, (42), 24 states have call successors, (24), 7 states have call predecessors, (24), 6 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-02 14:48:25,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 87 transitions. [2021-05-02 14:48:25,680 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 87 transitions. Word has length 43 [2021-05-02 14:48:25,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:48:25,680 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 87 transitions. [2021-05-02 14:48:25,680 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-05-02 14:48:25,681 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 87 transitions. [2021-05-02 14:48:25,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-05-02 14:48:25,681 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:48:25,681 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:48:25,892 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:48:25,895 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:48:25,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:48:25,896 INFO L82 PathProgramCache]: Analyzing trace with hash -301191846, now seen corresponding path program 1 times [2021-05-02 14:48:25,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:48:25,896 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273804098] [2021-05-02 14:48:25,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:48:25,905 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:48:25,906 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [869246875] [2021-05-02 14:48:25,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:48:25,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:48:25,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-02 14:48:25,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:48:26,025 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-05-02 14:48:26,026 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:48:26,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273804098] [2021-05-02 14:48:26,026 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:48:26,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869246875] [2021-05-02 14:48:26,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [869246875] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 14:48:26,026 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 14:48:26,026 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 14:48:26,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694289893] [2021-05-02 14:48:26,026 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 14:48:26,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:48:26,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 14:48:26,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-02 14:48:26,027 INFO L87 Difference]: Start difference. First operand 64 states and 87 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) [2021-05-02 14:48:26,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:48:26,059 INFO L93 Difference]: Finished difference Result 70 states and 92 transitions. [2021-05-02 14:48:26,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 14:48:26,060 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) Word has length 49 [2021-05-02 14:48:26,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:48:26,062 INFO L225 Difference]: With dead ends: 70 [2021-05-02 14:48:26,062 INFO L226 Difference]: Without dead ends: 68 [2021-05-02 14:48:26,062 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.9ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-02 14:48:26,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-05-02 14:48:26,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2021-05-02 14:48:26,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 36 states have (on average 1.25) internal successors, (45), 38 states have internal predecessors, (45), 24 states have call successors, (24), 8 states have call predecessors, (24), 7 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-02 14:48:26,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 90 transitions. [2021-05-02 14:48:26,090 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 90 transitions. Word has length 49 [2021-05-02 14:48:26,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:48:26,091 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 90 transitions. [2021-05-02 14:48:26,091 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) [2021-05-02 14:48:26,091 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 90 transitions. [2021-05-02 14:48:26,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-05-02 14:48:26,094 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:48:26,094 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:48:26,296 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:48:26,297 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:48:26,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:48:26,297 INFO L82 PathProgramCache]: Analyzing trace with hash -1107651435, now seen corresponding path program 1 times [2021-05-02 14:48:26,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:48:26,298 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155733136] [2021-05-02 14:48:26,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:48:26,308 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:48:26,308 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [841114425] [2021-05-02 14:48:26,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:48:26,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:48:26,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 14:48:26,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:48:26,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:26,483 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-05-02 14:48:26,483 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:48:26,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155733136] [2021-05-02 14:48:26,484 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:48:26,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841114425] [2021-05-02 14:48:26,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [841114425] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:48:26,484 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:48:26,484 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 14:48:26,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145725382] [2021-05-02 14:48:26,484 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 14:48:26,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:48:26,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 14:48:26,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-02 14:48:26,485 INFO L87 Difference]: Start difference. First operand 68 states and 90 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-05-02 14:48:26,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:48:26,582 INFO L93 Difference]: Finished difference Result 84 states and 108 transitions. [2021-05-02 14:48:26,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 14:48:26,582 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 51 [2021-05-02 14:48:26,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:48:26,583 INFO L225 Difference]: With dead ends: 84 [2021-05-02 14:48:26,583 INFO L226 Difference]: Without dead ends: 82 [2021-05-02 14:48:26,584 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 40.0ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-02 14:48:26,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-05-02 14:48:26,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 79. [2021-05-02 14:48:26,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 42 states have (on average 1.2142857142857142) internal successors, (51), 45 states have internal predecessors, (51), 27 states have call successors, (27), 10 states have call predecessors, (27), 9 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2021-05-02 14:48:26,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 102 transitions. [2021-05-02 14:48:26,595 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 102 transitions. Word has length 51 [2021-05-02 14:48:26,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:48:26,595 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 102 transitions. [2021-05-02 14:48:26,595 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-05-02 14:48:26,595 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 102 transitions. [2021-05-02 14:48:26,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-05-02 14:48:26,596 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:48:26,596 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:48:26,797 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-02 14:48:26,797 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:48:26,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:48:26,797 INFO L82 PathProgramCache]: Analyzing trace with hash 1924168317, now seen corresponding path program 1 times [2021-05-02 14:48:26,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:48:26,798 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352656091] [2021-05-02 14:48:26,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:48:26,807 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:48:26,807 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [795014365] [2021-05-02 14:48:26,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:48:26,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:48:26,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-02 14:48:26,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:48:26,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:26,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:26,987 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 15 proven. 5 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-05-02 14:48:26,988 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:48:26,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352656091] [2021-05-02 14:48:26,988 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:48:26,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795014365] [2021-05-02 14:48:26,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795014365] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:48:26,988 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:48:26,988 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 14:48:26,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748460689] [2021-05-02 14:48:26,988 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 14:48:26,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:48:26,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 14:48:26,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-02 14:48:26,989 INFO L87 Difference]: Start difference. First operand 79 states and 102 transitions. Second operand has 9 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-02 14:48:27,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:48:27,101 INFO L93 Difference]: Finished difference Result 88 states and 112 transitions. [2021-05-02 14:48:27,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 14:48:27,102 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 54 [2021-05-02 14:48:27,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:48:27,102 INFO L225 Difference]: With dead ends: 88 [2021-05-02 14:48:27,103 INFO L226 Difference]: Without dead ends: 84 [2021-05-02 14:48:27,103 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 44.6ms TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-05-02 14:48:27,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-05-02 14:48:27,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2021-05-02 14:48:27,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 46 states have (on average 1.1521739130434783) internal successors, (53), 49 states have internal predecessors, (53), 27 states have call successors, (27), 11 states have call predecessors, (27), 10 states have return successors, (25), 23 states have call predecessors, (25), 25 states have call successors, (25) [2021-05-02 14:48:27,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 105 transitions. [2021-05-02 14:48:27,112 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 105 transitions. Word has length 54 [2021-05-02 14:48:27,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:48:27,112 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 105 transitions. [2021-05-02 14:48:27,113 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-02 14:48:27,113 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 105 transitions. [2021-05-02 14:48:27,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-05-02 14:48:27,113 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:48:27,113 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:48:27,320 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:48:27,321 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:48:27,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:48:27,321 INFO L82 PathProgramCache]: Analyzing trace with hash 1698149216, now seen corresponding path program 1 times [2021-05-02 14:48:27,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:48:27,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308150342] [2021-05-02 14:48:27,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:48:27,334 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:48:27,335 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1996042260] [2021-05-02 14:48:27,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:48:27,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:48:27,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-02 14:48:27,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:48:27,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:27,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:27,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:27,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:27,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:27,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:27,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:27,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:27,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:27,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:27,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:27,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:27,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:27,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:27,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:27,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:27,631 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 10 proven. 19 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-05-02 14:48:27,631 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:48:27,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308150342] [2021-05-02 14:48:27,631 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:48:27,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996042260] [2021-05-02 14:48:27,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1996042260] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:48:27,631 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:48:27,632 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 14:48:27,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508597986] [2021-05-02 14:48:27,632 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 14:48:27,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:48:27,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 14:48:27,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-05-02 14:48:27,634 INFO L87 Difference]: Start difference. First operand 84 states and 105 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 5 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2021-05-02 14:48:27,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:48:27,846 INFO L93 Difference]: Finished difference Result 118 states and 147 transitions. [2021-05-02 14:48:27,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 14:48:27,847 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 5 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) Word has length 56 [2021-05-02 14:48:27,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:48:27,848 INFO L225 Difference]: With dead ends: 118 [2021-05-02 14:48:27,848 INFO L226 Difference]: Without dead ends: 116 [2021-05-02 14:48:27,848 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 111.2ms TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-05-02 14:48:27,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-05-02 14:48:27,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 112. [2021-05-02 14:48:27,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 64 states have (on average 1.15625) internal successors, (74), 67 states have internal predecessors, (74), 33 states have call successors, (33), 15 states have call predecessors, (33), 14 states have return successors, (31), 29 states have call predecessors, (31), 31 states have call successors, (31) [2021-05-02 14:48:27,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 138 transitions. [2021-05-02 14:48:27,859 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 138 transitions. Word has length 56 [2021-05-02 14:48:27,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:48:27,859 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 138 transitions. [2021-05-02 14:48:27,859 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 5 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2021-05-02 14:48:27,859 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 138 transitions. [2021-05-02 14:48:27,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-05-02 14:48:27,860 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:48:27,860 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:48:28,076 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:48:28,077 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:48:28,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:48:28,077 INFO L82 PathProgramCache]: Analyzing trace with hash 888099957, now seen corresponding path program 2 times [2021-05-02 14:48:28,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:48:28,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233058353] [2021-05-02 14:48:28,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:48:28,085 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:48:28,085 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1119667846] [2021-05-02 14:48:28,085 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:48:28,149 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 14:48:28,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:48:28,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-02 14:48:28,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:48:28,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:28,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:28,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:28,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:28,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:28,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:28,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:28,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:28,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:28,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:28,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:28,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:28,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:28,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:28,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:28,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:28,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:28,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:28,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:28,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:28,333 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 13 proven. 13 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-05-02 14:48:28,333 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:48:28,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233058353] [2021-05-02 14:48:28,333 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:48:28,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119667846] [2021-05-02 14:48:28,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119667846] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:48:28,334 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:48:28,334 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 14:48:28,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433784405] [2021-05-02 14:48:28,334 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 14:48:28,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:48:28,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 14:48:28,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 14:48:28,335 INFO L87 Difference]: Start difference. First operand 112 states and 138 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2021-05-02 14:48:28,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:48:28,468 INFO L93 Difference]: Finished difference Result 137 states and 178 transitions. [2021-05-02 14:48:28,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 14:48:28,468 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) Word has length 61 [2021-05-02 14:48:28,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:48:28,469 INFO L225 Difference]: With dead ends: 137 [2021-05-02 14:48:28,469 INFO L226 Difference]: Without dead ends: 131 [2021-05-02 14:48:28,470 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 61.6ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-02 14:48:28,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-05-02 14:48:28,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2021-05-02 14:48:28,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 73 states have (on average 1.178082191780822) internal successors, (86), 77 states have internal predecessors, (86), 42 states have call successors, (42), 16 states have call predecessors, (42), 15 states have return successors, (39), 37 states have call predecessors, (39), 39 states have call successors, (39) [2021-05-02 14:48:28,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 167 transitions. [2021-05-02 14:48:28,481 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 167 transitions. Word has length 61 [2021-05-02 14:48:28,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:48:28,481 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 167 transitions. [2021-05-02 14:48:28,481 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2021-05-02 14:48:28,481 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 167 transitions. [2021-05-02 14:48:28,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-05-02 14:48:28,482 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:48:28,482 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:48:28,696 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-05-02 14:48:28,696 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:48:28,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:48:28,696 INFO L82 PathProgramCache]: Analyzing trace with hash 2064127436, now seen corresponding path program 1 times [2021-05-02 14:48:28,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:48:28,696 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958614078] [2021-05-02 14:48:28,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:48:28,704 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:48:28,704 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1596607713] [2021-05-02 14:48:28,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:48:28,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:48:28,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-02 14:48:28,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:48:28,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:28,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:28,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:28,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:28,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:28,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:28,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:28,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:28,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:28,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:28,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:28,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:28,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:28,910 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 18 proven. 13 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-05-02 14:48:28,911 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:48:28,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958614078] [2021-05-02 14:48:28,911 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:48:28,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596607713] [2021-05-02 14:48:28,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596607713] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:48:28,911 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:48:28,911 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 14:48:28,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192057507] [2021-05-02 14:48:28,912 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 14:48:28,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:48:28,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 14:48:28,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-05-02 14:48:28,912 INFO L87 Difference]: Start difference. First operand 131 states and 167 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-02 14:48:29,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:48:29,106 INFO L93 Difference]: Finished difference Result 151 states and 193 transitions. [2021-05-02 14:48:29,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 14:48:29,107 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 69 [2021-05-02 14:48:29,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:48:29,109 INFO L225 Difference]: With dead ends: 151 [2021-05-02 14:48:29,109 INFO L226 Difference]: Without dead ends: 149 [2021-05-02 14:48:29,110 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 90.6ms TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-05-02 14:48:29,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-05-02 14:48:29,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 147. [2021-05-02 14:48:29,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 81 states have (on average 1.1728395061728396) internal successors, (95), 86 states have internal predecessors, (95), 48 states have call successors, (48), 18 states have call predecessors, (48), 17 states have return successors, (45), 42 states have call predecessors, (45), 45 states have call successors, (45) [2021-05-02 14:48:29,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 188 transitions. [2021-05-02 14:48:29,132 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 188 transitions. Word has length 69 [2021-05-02 14:48:29,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:48:29,133 INFO L480 AbstractCegarLoop]: Abstraction has 147 states and 188 transitions. [2021-05-02 14:48:29,133 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-02 14:48:29,133 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 188 transitions. [2021-05-02 14:48:29,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-05-02 14:48:29,134 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:48:29,134 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:48:29,336 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:48:29,337 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:48:29,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:48:29,337 INFO L82 PathProgramCache]: Analyzing trace with hash 1872855628, now seen corresponding path program 2 times [2021-05-02 14:48:29,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:48:29,338 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100240584] [2021-05-02 14:48:29,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:48:29,344 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:48:29,344 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1941925594] [2021-05-02 14:48:29,345 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:48:29,400 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 14:48:29,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:48:29,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-02 14:48:29,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:48:29,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:29,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:29,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:29,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:29,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:29,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:29,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:29,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:29,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:29,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:29,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:29,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:29,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:29,563 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 18 proven. 13 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-05-02 14:48:29,563 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:48:29,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100240584] [2021-05-02 14:48:29,563 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:48:29,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941925594] [2021-05-02 14:48:29,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941925594] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:48:29,563 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:48:29,563 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 14:48:29,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853317436] [2021-05-02 14:48:29,564 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 14:48:29,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:48:29,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 14:48:29,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-05-02 14:48:29,564 INFO L87 Difference]: Start difference. First operand 147 states and 188 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-02 14:48:29,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:48:29,731 INFO L93 Difference]: Finished difference Result 166 states and 212 transitions. [2021-05-02 14:48:29,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 14:48:29,732 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 69 [2021-05-02 14:48:29,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:48:29,733 INFO L225 Difference]: With dead ends: 166 [2021-05-02 14:48:29,733 INFO L226 Difference]: Without dead ends: 161 [2021-05-02 14:48:29,733 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 95.2ms TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-05-02 14:48:29,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-05-02 14:48:29,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 160. [2021-05-02 14:48:29,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 89 states have (on average 1.1573033707865168) internal successors, (103), 94 states have internal predecessors, (103), 51 states have call successors, (51), 20 states have call predecessors, (51), 19 states have return successors, (48), 45 states have call predecessors, (48), 48 states have call successors, (48) [2021-05-02 14:48:29,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 202 transitions. [2021-05-02 14:48:29,766 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 202 transitions. Word has length 69 [2021-05-02 14:48:29,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:48:29,766 INFO L480 AbstractCegarLoop]: Abstraction has 160 states and 202 transitions. [2021-05-02 14:48:29,766 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-02 14:48:29,766 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 202 transitions. [2021-05-02 14:48:29,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-05-02 14:48:29,768 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:48:29,768 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:48:29,976 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:48:29,977 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:48:29,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:48:29,978 INFO L82 PathProgramCache]: Analyzing trace with hash 1196252297, now seen corresponding path program 2 times [2021-05-02 14:48:29,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:48:29,978 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700268515] [2021-05-02 14:48:29,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:48:29,984 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:48:29,984 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1198626633] [2021-05-02 14:48:29,984 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:48:30,034 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 14:48:30,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:48:30,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 44 conjunts are in the unsatisfiable core [2021-05-02 14:48:30,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:48:30,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:30,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:30,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:30,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:30,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:30,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:30,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:30,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:30,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:30,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:30,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:30,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:30,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:30,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:30,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:30,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:30,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:30,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:30,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:30,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:30,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:30,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:30,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:30,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:30,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:30,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:30,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:30,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:30,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:30,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:30,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:30,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:30,268 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 20 proven. 18 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2021-05-02 14:48:30,269 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:48:30,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700268515] [2021-05-02 14:48:30,269 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:48:30,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198626633] [2021-05-02 14:48:30,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1198626633] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:48:30,269 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:48:30,269 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 14:48:30,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994721357] [2021-05-02 14:48:30,269 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 14:48:30,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:48:30,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 14:48:30,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-02 14:48:30,270 INFO L87 Difference]: Start difference. First operand 160 states and 202 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 9 states have internal predecessors, (24), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-02 14:48:30,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:48:30,452 INFO L93 Difference]: Finished difference Result 190 states and 241 transitions. [2021-05-02 14:48:30,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 14:48:30,452 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 9 states have internal predecessors, (24), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) Word has length 74 [2021-05-02 14:48:30,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:48:30,453 INFO L225 Difference]: With dead ends: 190 [2021-05-02 14:48:30,453 INFO L226 Difference]: Without dead ends: 188 [2021-05-02 14:48:30,454 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 94.5ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-02 14:48:30,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-05-02 14:48:30,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 184. [2021-05-02 14:48:30,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 104 states have (on average 1.1634615384615385) internal successors, (121), 109 states have internal predecessors, (121), 57 states have call successors, (57), 23 states have call predecessors, (57), 22 states have return successors, (54), 51 states have call predecessors, (54), 54 states have call successors, (54) [2021-05-02 14:48:30,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 232 transitions. [2021-05-02 14:48:30,467 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 232 transitions. Word has length 74 [2021-05-02 14:48:30,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:48:30,467 INFO L480 AbstractCegarLoop]: Abstraction has 184 states and 232 transitions. [2021-05-02 14:48:30,467 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 9 states have internal predecessors, (24), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-02 14:48:30,467 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 232 transitions. [2021-05-02 14:48:30,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-05-02 14:48:30,468 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:48:30,468 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:48:30,684 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-05-02 14:48:30,684 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:48:30,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:48:30,685 INFO L82 PathProgramCache]: Analyzing trace with hash -1712511605, now seen corresponding path program 3 times [2021-05-02 14:48:30,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:48:30,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819306989] [2021-05-02 14:48:30,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:48:30,691 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:48:30,691 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1621765202] [2021-05-02 14:48:30,691 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:48:30,764 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 14:48:30,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:48:30,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-02 14:48:30,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:48:30,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:30,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:30,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:30,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:30,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:30,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:30,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:30,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:30,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:30,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:30,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:30,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:30,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:30,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:30,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:30,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:30,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:30,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:30,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:30,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:31,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:31,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:31,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:31,040 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 28 proven. 16 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-05-02 14:48:31,040 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:48:31,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819306989] [2021-05-02 14:48:31,041 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:48:31,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621765202] [2021-05-02 14:48:31,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1621765202] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:48:31,041 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:48:31,041 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 14:48:31,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810126939] [2021-05-02 14:48:31,041 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 14:48:31,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:48:31,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 14:48:31,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-02 14:48:31,042 INFO L87 Difference]: Start difference. First operand 184 states and 232 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-02 14:48:31,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:48:31,237 INFO L93 Difference]: Finished difference Result 213 states and 266 transitions. [2021-05-02 14:48:31,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 14:48:31,237 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) Word has length 74 [2021-05-02 14:48:31,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:48:31,238 INFO L225 Difference]: With dead ends: 213 [2021-05-02 14:48:31,239 INFO L226 Difference]: Without dead ends: 211 [2021-05-02 14:48:31,239 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 111.2ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-02 14:48:31,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-05-02 14:48:31,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 197. [2021-05-02 14:48:31,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 114 states have (on average 1.1578947368421053) internal successors, (132), 119 states have internal predecessors, (132), 57 states have call successors, (57), 26 states have call predecessors, (57), 25 states have return successors, (54), 51 states have call predecessors, (54), 54 states have call successors, (54) [2021-05-02 14:48:31,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 243 transitions. [2021-05-02 14:48:31,254 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 243 transitions. Word has length 74 [2021-05-02 14:48:31,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:48:31,255 INFO L480 AbstractCegarLoop]: Abstraction has 197 states and 243 transitions. [2021-05-02 14:48:31,255 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-02 14:48:31,255 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 243 transitions. [2021-05-02 14:48:31,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-05-02 14:48:31,255 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:48:31,255 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:48:31,461 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-02 14:48:31,461 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:48:31,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:48:31,462 INFO L82 PathProgramCache]: Analyzing trace with hash 15858924, now seen corresponding path program 4 times [2021-05-02 14:48:31,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:48:31,462 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830987276] [2021-05-02 14:48:31,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:48:31,468 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:48:31,469 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1290766782] [2021-05-02 14:48:31,469 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:48:31,530 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 14:48:31,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:48:31,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 44 conjunts are in the unsatisfiable core [2021-05-02 14:48:31,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:48:31,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:31,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:31,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:31,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:31,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:31,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:31,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:31,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:31,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:31,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:31,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:31,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:31,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:31,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:31,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:31,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:31,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:31,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:31,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:31,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:31,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:31,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:31,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:31,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:31,756 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 42 proven. 18 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2021-05-02 14:48:31,756 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:48:31,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830987276] [2021-05-02 14:48:31,756 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:48:31,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290766782] [2021-05-02 14:48:31,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1290766782] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:48:31,757 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:48:31,757 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-02 14:48:31,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282972226] [2021-05-02 14:48:31,757 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 14:48:31,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:48:31,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 14:48:31,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-05-02 14:48:31,758 INFO L87 Difference]: Start difference. First operand 197 states and 243 transitions. Second operand has 13 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-02 14:48:32,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:48:32,105 INFO L93 Difference]: Finished difference Result 219 states and 272 transitions. [2021-05-02 14:48:32,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 14:48:32,105 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) Word has length 79 [2021-05-02 14:48:32,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:48:32,107 INFO L225 Difference]: With dead ends: 219 [2021-05-02 14:48:32,107 INFO L226 Difference]: Without dead ends: 212 [2021-05-02 14:48:32,108 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 117.0ms TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-05-02 14:48:32,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2021-05-02 14:48:32,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 175. [2021-05-02 14:48:32,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 103 states have (on average 1.145631067961165) internal successors, (118), 107 states have internal predecessors, (118), 48 states have call successors, (48), 24 states have call predecessors, (48), 23 states have return successors, (45), 43 states have call predecessors, (45), 45 states have call successors, (45) [2021-05-02 14:48:32,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 211 transitions. [2021-05-02 14:48:32,121 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 211 transitions. Word has length 79 [2021-05-02 14:48:32,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:48:32,122 INFO L480 AbstractCegarLoop]: Abstraction has 175 states and 211 transitions. [2021-05-02 14:48:32,122 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-02 14:48:32,122 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 211 transitions. [2021-05-02 14:48:32,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-05-02 14:48:32,123 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:48:32,123 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:48:32,336 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-02 14:48:32,337 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:48:32,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:48:32,337 INFO L82 PathProgramCache]: Analyzing trace with hash 2066842922, now seen corresponding path program 3 times [2021-05-02 14:48:32,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:48:32,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826078502] [2021-05-02 14:48:32,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:48:32,343 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:48:32,343 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [224386316] [2021-05-02 14:48:32,343 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:48:32,389 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 14:48:32,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:48:32,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 44 conjunts are in the unsatisfiable core [2021-05-02 14:48:32,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:48:32,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:32,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:32,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:32,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:32,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:32,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:32,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:32,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:32,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:32,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:32,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:32,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:32,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:32,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:32,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:32,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:32,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:32,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:32,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:32,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:32,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:32,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:32,601 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 42 proven. 18 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2021-05-02 14:48:32,602 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:48:32,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826078502] [2021-05-02 14:48:32,602 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:48:32,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224386316] [2021-05-02 14:48:32,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224386316] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:48:32,602 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:48:32,602 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-02 14:48:32,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400702538] [2021-05-02 14:48:32,602 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 14:48:32,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:48:32,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 14:48:32,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-05-02 14:48:32,603 INFO L87 Difference]: Start difference. First operand 175 states and 211 transitions. Second operand has 13 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-02 14:48:32,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:48:32,971 INFO L93 Difference]: Finished difference Result 209 states and 258 transitions. [2021-05-02 14:48:32,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 14:48:32,972 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) Word has length 79 [2021-05-02 14:48:32,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:48:32,973 INFO L225 Difference]: With dead ends: 209 [2021-05-02 14:48:32,973 INFO L226 Difference]: Without dead ends: 202 [2021-05-02 14:48:32,973 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 110.6ms TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-05-02 14:48:32,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-05-02 14:48:32,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 199. [2021-05-02 14:48:32,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 118 states have (on average 1.152542372881356) internal successors, (136), 122 states have internal predecessors, (136), 54 states have call successors, (54), 27 states have call predecessors, (54), 26 states have return successors, (51), 49 states have call predecessors, (51), 51 states have call successors, (51) [2021-05-02 14:48:32,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 241 transitions. [2021-05-02 14:48:32,990 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 241 transitions. Word has length 79 [2021-05-02 14:48:32,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:48:32,990 INFO L480 AbstractCegarLoop]: Abstraction has 199 states and 241 transitions. [2021-05-02 14:48:32,990 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-02 14:48:32,990 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 241 transitions. [2021-05-02 14:48:32,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-05-02 14:48:32,991 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:48:32,991 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:48:33,204 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:48:33,205 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:48:33,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:48:33,205 INFO L82 PathProgramCache]: Analyzing trace with hash -105752765, now seen corresponding path program 5 times [2021-05-02 14:48:33,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:48:33,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889534585] [2021-05-02 14:48:33,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:48:33,211 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:48:33,211 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1007344992] [2021-05-02 14:48:33,211 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:48:33,280 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-05-02 14:48:33,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:48:33,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-02 14:48:33,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:48:33,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:33,427 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 20 proven. 28 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2021-05-02 14:48:33,427 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:48:33,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889534585] [2021-05-02 14:48:33,427 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:48:33,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007344992] [2021-05-02 14:48:33,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007344992] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:48:33,428 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:48:33,428 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 14:48:33,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115448502] [2021-05-02 14:48:33,428 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 14:48:33,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:48:33,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 14:48:33,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 14:48:33,429 INFO L87 Difference]: Start difference. First operand 199 states and 241 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-05-02 14:48:33,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:48:33,562 INFO L93 Difference]: Finished difference Result 231 states and 288 transitions. [2021-05-02 14:48:33,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 14:48:33,562 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 87 [2021-05-02 14:48:33,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:48:33,563 INFO L225 Difference]: With dead ends: 231 [2021-05-02 14:48:33,563 INFO L226 Difference]: Without dead ends: 229 [2021-05-02 14:48:33,564 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 78 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 40.5ms TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-05-02 14:48:33,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2021-05-02 14:48:33,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 216. [2021-05-02 14:48:33,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 125 states have (on average 1.16) internal successors, (145), 130 states have internal predecessors, (145), 63 states have call successors, (63), 28 states have call predecessors, (63), 27 states have return successors, (60), 57 states have call predecessors, (60), 60 states have call successors, (60) [2021-05-02 14:48:33,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 268 transitions. [2021-05-02 14:48:33,579 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 268 transitions. Word has length 87 [2021-05-02 14:48:33,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:48:33,580 INFO L480 AbstractCegarLoop]: Abstraction has 216 states and 268 transitions. [2021-05-02 14:48:33,580 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-05-02 14:48:33,580 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 268 transitions. [2021-05-02 14:48:33,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-05-02 14:48:33,580 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:48:33,580 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:48:33,796 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-02 14:48:33,797 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:48:33,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:48:33,797 INFO L82 PathProgramCache]: Analyzing trace with hash -297024573, now seen corresponding path program 6 times [2021-05-02 14:48:33,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:48:33,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103747395] [2021-05-02 14:48:33,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:48:33,802 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:48:33,803 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1122755614] [2021-05-02 14:48:33,803 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:48:33,858 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-02 14:48:33,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:48:33,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-02 14:48:33,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:48:33,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:33,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:33,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:33,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:33,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:34,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:34,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:34,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:34,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:34,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:34,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:34,068 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 27 proven. 24 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2021-05-02 14:48:34,068 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:48:34,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103747395] [2021-05-02 14:48:34,068 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:48:34,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122755614] [2021-05-02 14:48:34,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1122755614] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:48:34,068 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:48:34,068 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 14:48:34,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911371141] [2021-05-02 14:48:34,069 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 14:48:34,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:48:34,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 14:48:34,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-05-02 14:48:34,069 INFO L87 Difference]: Start difference. First operand 216 states and 268 transitions. Second operand has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 9 states have internal predecessors, (27), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) [2021-05-02 14:48:34,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:48:34,328 INFO L93 Difference]: Finished difference Result 241 states and 302 transitions. [2021-05-02 14:48:34,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 14:48:34,329 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 9 states have internal predecessors, (27), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) Word has length 87 [2021-05-02 14:48:34,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:48:34,330 INFO L225 Difference]: With dead ends: 241 [2021-05-02 14:48:34,330 INFO L226 Difference]: Without dead ends: 236 [2021-05-02 14:48:34,330 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 109.7ms TimeCoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-05-02 14:48:34,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-05-02 14:48:34,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 235. [2021-05-02 14:48:34,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 136 states have (on average 1.1544117647058822) internal successors, (157), 141 states have internal predecessors, (157), 69 states have call successors, (69), 30 states have call predecessors, (69), 29 states have return successors, (66), 63 states have call predecessors, (66), 66 states have call successors, (66) [2021-05-02 14:48:34,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 292 transitions. [2021-05-02 14:48:34,348 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 292 transitions. Word has length 87 [2021-05-02 14:48:34,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:48:34,348 INFO L480 AbstractCegarLoop]: Abstraction has 235 states and 292 transitions. [2021-05-02 14:48:34,348 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 9 states have internal predecessors, (27), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) [2021-05-02 14:48:34,348 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 292 transitions. [2021-05-02 14:48:34,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-05-02 14:48:34,349 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:48:34,349 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:48:34,564 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-02 14:48:34,564 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:48:34,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:48:34,565 INFO L82 PathProgramCache]: Analyzing trace with hash -239766271, now seen corresponding path program 7 times [2021-05-02 14:48:34,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:48:34,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585105801] [2021-05-02 14:48:34,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:48:34,570 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:48:34,570 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1692127759] [2021-05-02 14:48:34,570 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:48:34,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:48:34,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-02 14:48:34,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:48:34,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:34,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:34,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:34,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:34,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:34,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:34,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:34,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:34,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:34,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:34,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:34,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:34,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:34,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:34,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:34,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:34,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:34,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:34,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:34,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:34,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:34,824 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 24 proven. 27 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2021-05-02 14:48:34,824 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:48:34,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585105801] [2021-05-02 14:48:34,824 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:48:34,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692127759] [2021-05-02 14:48:34,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1692127759] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:48:34,825 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:48:34,825 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 14:48:34,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057816156] [2021-05-02 14:48:34,825 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 14:48:34,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:48:34,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 14:48:34,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2021-05-02 14:48:34,826 INFO L87 Difference]: Start difference. First operand 235 states and 292 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2021-05-02 14:48:35,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:48:35,098 INFO L93 Difference]: Finished difference Result 251 states and 315 transitions. [2021-05-02 14:48:35,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 14:48:35,098 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 87 [2021-05-02 14:48:35,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:48:35,099 INFO L225 Difference]: With dead ends: 251 [2021-05-02 14:48:35,099 INFO L226 Difference]: Without dead ends: 249 [2021-05-02 14:48:35,101 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 153.8ms TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-05-02 14:48:35,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-05-02 14:48:35,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 247. [2021-05-02 14:48:35,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 141 states have (on average 1.1560283687943262) internal successors, (163), 147 states have internal predecessors, (163), 75 states have call successors, (75), 31 states have call predecessors, (75), 30 states have return successors, (72), 68 states have call predecessors, (72), 72 states have call successors, (72) [2021-05-02 14:48:35,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 310 transitions. [2021-05-02 14:48:35,124 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 310 transitions. Word has length 87 [2021-05-02 14:48:35,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:48:35,124 INFO L480 AbstractCegarLoop]: Abstraction has 247 states and 310 transitions. [2021-05-02 14:48:35,124 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2021-05-02 14:48:35,124 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 310 transitions. [2021-05-02 14:48:35,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-05-02 14:48:35,125 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:48:35,125 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:48:35,341 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-02 14:48:35,341 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:48:35,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:48:35,341 INFO L82 PathProgramCache]: Analyzing trace with hash 85135427, now seen corresponding path program 8 times [2021-05-02 14:48:35,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:48:35,341 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728293963] [2021-05-02 14:48:35,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:48:35,351 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:48:35,351 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [531510251] [2021-05-02 14:48:35,351 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:48:35,400 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 14:48:35,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:48:35,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-02 14:48:35,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:48:35,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:35,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:35,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:35,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:35,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:35,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:35,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:35,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:35,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:35,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:35,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:35,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:35,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:35,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:35,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:35,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:35,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:35,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:35,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:35,595 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 27 proven. 24 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2021-05-02 14:48:35,595 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:48:35,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728293963] [2021-05-02 14:48:35,595 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:48:35,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531510251] [2021-05-02 14:48:35,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [531510251] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:48:35,595 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:48:35,595 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 14:48:35,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333658925] [2021-05-02 14:48:35,596 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 14:48:35,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:48:35,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 14:48:35,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2021-05-02 14:48:35,600 INFO L87 Difference]: Start difference. First operand 247 states and 310 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) [2021-05-02 14:48:35,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:48:35,865 INFO L93 Difference]: Finished difference Result 262 states and 331 transitions. [2021-05-02 14:48:35,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 14:48:35,866 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) Word has length 87 [2021-05-02 14:48:35,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:48:35,867 INFO L225 Difference]: With dead ends: 262 [2021-05-02 14:48:35,867 INFO L226 Difference]: Without dead ends: 257 [2021-05-02 14:48:35,867 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 141.3ms TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-05-02 14:48:35,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2021-05-02 14:48:35,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 247. [2021-05-02 14:48:35,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 141 states have (on average 1.1560283687943262) internal successors, (163), 147 states have internal predecessors, (163), 75 states have call successors, (75), 31 states have call predecessors, (75), 30 states have return successors, (72), 68 states have call predecessors, (72), 72 states have call successors, (72) [2021-05-02 14:48:35,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 310 transitions. [2021-05-02 14:48:35,886 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 310 transitions. Word has length 87 [2021-05-02 14:48:35,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:48:35,886 INFO L480 AbstractCegarLoop]: Abstraction has 247 states and 310 transitions. [2021-05-02 14:48:35,886 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) [2021-05-02 14:48:35,886 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 310 transitions. [2021-05-02 14:48:35,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-05-02 14:48:35,887 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:48:35,887 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:48:36,100 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:48:36,101 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:48:36,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:48:36,101 INFO L82 PathProgramCache]: Analyzing trace with hash 142393729, now seen corresponding path program 9 times [2021-05-02 14:48:36,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:48:36,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808187551] [2021-05-02 14:48:36,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:48:36,106 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:48:36,107 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [631018245] [2021-05-02 14:48:36,107 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:48:36,156 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-02 14:48:36,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:48:36,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-02 14:48:36,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:48:36,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:36,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:36,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:36,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:36,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:36,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:36,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:36,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:36,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:36,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:36,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:36,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:36,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:36,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:36,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:36,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:36,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:36,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:36,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:36,330 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 57 proven. 12 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2021-05-02 14:48:36,330 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:48:36,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808187551] [2021-05-02 14:48:36,330 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:48:36,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631018245] [2021-05-02 14:48:36,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [631018245] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:48:36,330 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:48:36,330 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 14:48:36,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752321730] [2021-05-02 14:48:36,331 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 14:48:36,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:48:36,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 14:48:36,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-05-02 14:48:36,331 INFO L87 Difference]: Start difference. First operand 247 states and 310 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 10 states have internal predecessors, (28), 5 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-02 14:48:42,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:48:42,526 INFO L93 Difference]: Finished difference Result 253 states and 315 transitions. [2021-05-02 14:48:42,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 14:48:42,526 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 10 states have internal predecessors, (28), 5 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 87 [2021-05-02 14:48:42,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:48:42,527 INFO L225 Difference]: With dead ends: 253 [2021-05-02 14:48:42,527 INFO L226 Difference]: Without dead ends: 248 [2021-05-02 14:48:42,528 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 84.8ms TimeCoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-05-02 14:48:42,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-05-02 14:48:42,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 228. [2021-05-02 14:48:42,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 136 states have (on average 1.1323529411764706) internal successors, (154), 141 states have internal predecessors, (154), 61 states have call successors, (61), 31 states have call predecessors, (61), 30 states have return successors, (59), 55 states have call predecessors, (59), 59 states have call successors, (59) [2021-05-02 14:48:42,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 274 transitions. [2021-05-02 14:48:42,559 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 274 transitions. Word has length 87 [2021-05-02 14:48:42,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:48:42,559 INFO L480 AbstractCegarLoop]: Abstraction has 228 states and 274 transitions. [2021-05-02 14:48:42,559 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 10 states have internal predecessors, (28), 5 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-02 14:48:42,559 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 274 transitions. [2021-05-02 14:48:42,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-05-02 14:48:42,560 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:48:42,560 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:48:42,768 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:48:42,769 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:48:42,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:48:42,769 INFO L82 PathProgramCache]: Analyzing trace with hash -48878079, now seen corresponding path program 10 times [2021-05-02 14:48:42,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:48:42,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185272373] [2021-05-02 14:48:42,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:48:42,774 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:48:42,775 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2059472612] [2021-05-02 14:48:42,775 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:48:42,817 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 14:48:42,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:48:42,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-02 14:48:42,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:48:42,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:42,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:42,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:42,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:42,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:42,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:42,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:42,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:42,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:42,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:42,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:42,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:42,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:42,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:42,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:42,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:43,037 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 24 proven. 27 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2021-05-02 14:48:43,038 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:48:43,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185272373] [2021-05-02 14:48:43,038 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:48:43,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059472612] [2021-05-02 14:48:43,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2059472612] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:48:43,038 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:48:43,038 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 14:48:43,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177404219] [2021-05-02 14:48:43,038 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 14:48:43,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:48:43,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 14:48:43,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2021-05-02 14:48:43,039 INFO L87 Difference]: Start difference. First operand 228 states and 274 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2021-05-02 14:48:43,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:48:43,294 INFO L93 Difference]: Finished difference Result 240 states and 289 transitions. [2021-05-02 14:48:43,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 14:48:43,294 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 87 [2021-05-02 14:48:43,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:48:43,295 INFO L225 Difference]: With dead ends: 240 [2021-05-02 14:48:43,295 INFO L226 Difference]: Without dead ends: 238 [2021-05-02 14:48:43,296 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 154.2ms TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-05-02 14:48:43,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-05-02 14:48:43,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 234. [2021-05-02 14:48:43,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 140 states have (on average 1.1285714285714286) internal successors, (158), 146 states have internal predecessors, (158), 62 states have call successors, (62), 32 states have call predecessors, (62), 31 states have return successors, (60), 55 states have call predecessors, (60), 60 states have call successors, (60) [2021-05-02 14:48:43,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 280 transitions. [2021-05-02 14:48:43,314 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 280 transitions. Word has length 87 [2021-05-02 14:48:43,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:48:43,315 INFO L480 AbstractCegarLoop]: Abstraction has 234 states and 280 transitions. [2021-05-02 14:48:43,315 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2021-05-02 14:48:43,315 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 280 transitions. [2021-05-02 14:48:43,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-05-02 14:48:43,315 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:48:43,315 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:48:43,528 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-05-02 14:48:43,529 INFO L428 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:48:43,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:48:43,529 INFO L82 PathProgramCache]: Analyzing trace with hash 418671986, now seen corresponding path program 3 times [2021-05-02 14:48:43,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:48:43,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197338291] [2021-05-02 14:48:43,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:48:43,534 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:48:43,534 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [216925569] [2021-05-02 14:48:43,534 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:48:43,581 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-02 14:48:43,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:48:43,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-02 14:48:43,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:48:43,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:43,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:43,790 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 82 proven. 18 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2021-05-02 14:48:43,790 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:48:43,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197338291] [2021-05-02 14:48:43,790 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:48:43,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216925569] [2021-05-02 14:48:43,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [216925569] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:48:43,790 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:48:43,790 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 14:48:43,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679135553] [2021-05-02 14:48:43,790 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 14:48:43,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:48:43,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 14:48:43,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-02 14:48:43,791 INFO L87 Difference]: Start difference. First operand 234 states and 280 transitions. Second operand has 11 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 6 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-02 14:48:47,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:48:47,982 INFO L93 Difference]: Finished difference Result 268 states and 323 transitions. [2021-05-02 14:48:47,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 14:48:47,982 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 6 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 92 [2021-05-02 14:48:47,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:48:47,983 INFO L225 Difference]: With dead ends: 268 [2021-05-02 14:48:47,983 INFO L226 Difference]: Without dead ends: 266 [2021-05-02 14:48:47,984 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 82 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 84.8ms TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-05-02 14:48:47,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-05-02 14:48:48,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 252. [2021-05-02 14:48:48,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 152 states have (on average 1.131578947368421) internal successors, (172), 158 states have internal predecessors, (172), 65 states have call successors, (65), 35 states have call predecessors, (65), 34 states have return successors, (63), 58 states have call predecessors, (63), 63 states have call successors, (63) [2021-05-02 14:48:48,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 300 transitions. [2021-05-02 14:48:48,002 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 300 transitions. Word has length 92 [2021-05-02 14:48:48,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:48:48,002 INFO L480 AbstractCegarLoop]: Abstraction has 252 states and 300 transitions. [2021-05-02 14:48:48,002 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 6 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-02 14:48:48,002 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 300 transitions. [2021-05-02 14:48:48,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-05-02 14:48:48,003 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:48:48,003 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:48:48,216 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-05-02 14:48:48,217 INFO L428 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:48:48,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:48:48,217 INFO L82 PathProgramCache]: Analyzing trace with hash 1804875380, now seen corresponding path program 11 times [2021-05-02 14:48:48,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:48:48,217 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331750368] [2021-05-02 14:48:48,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:48:48,227 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:48:48,227 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1700476984] [2021-05-02 14:48:48,227 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:48:48,313 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-05-02 14:48:48,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:48:48,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 44 conjunts are in the unsatisfiable core [2021-05-02 14:48:48,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:48:48,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:48,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:48,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:48,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:48,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:48,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:48,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:48,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:48,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:48,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:48,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:48,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:48,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:48,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:48,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:48,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:48,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:48,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:48,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:48,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:48,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:48,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:48,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:48,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:48,583 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 26 proven. 30 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2021-05-02 14:48:48,583 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:48:48,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331750368] [2021-05-02 14:48:48,583 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:48:48,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700476984] [2021-05-02 14:48:48,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1700476984] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:48:48,583 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:48:48,583 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 14:48:48,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646167887] [2021-05-02 14:48:48,584 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 14:48:48,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:48:48,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 14:48:48,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-05-02 14:48:48,584 INFO L87 Difference]: Start difference. First operand 252 states and 300 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2021-05-02 14:48:48,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:48:48,858 INFO L93 Difference]: Finished difference Result 282 states and 339 transitions. [2021-05-02 14:48:48,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 14:48:48,858 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) Word has length 92 [2021-05-02 14:48:48,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:48:48,860 INFO L225 Difference]: With dead ends: 282 [2021-05-02 14:48:48,860 INFO L226 Difference]: Without dead ends: 280 [2021-05-02 14:48:48,860 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 117.5ms TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-05-02 14:48:48,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2021-05-02 14:48:48,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 266. [2021-05-02 14:48:48,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 161 states have (on average 1.1304347826086956) internal successors, (182), 167 states have internal predecessors, (182), 68 states have call successors, (68), 37 states have call predecessors, (68), 36 states have return successors, (66), 61 states have call predecessors, (66), 66 states have call successors, (66) [2021-05-02 14:48:48,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 316 transitions. [2021-05-02 14:48:48,886 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 316 transitions. Word has length 92 [2021-05-02 14:48:48,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:48:48,886 INFO L480 AbstractCegarLoop]: Abstraction has 266 states and 316 transitions. [2021-05-02 14:48:48,886 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2021-05-02 14:48:48,887 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 316 transitions. [2021-05-02 14:48:48,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-05-02 14:48:48,888 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:48:48,888 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:48:49,096 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:48:49,097 INFO L428 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:48:49,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:48:49,097 INFO L82 PathProgramCache]: Analyzing trace with hash 65583604, now seen corresponding path program 12 times [2021-05-02 14:48:49,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:48:49,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313136366] [2021-05-02 14:48:49,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:48:49,105 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:48:49,105 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2032311781] [2021-05-02 14:48:49,105 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:48:49,160 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-02 14:48:49,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:48:49,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-02 14:48:49,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:48:49,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:49,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:49,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:49,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:49,375 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 42 proven. 47 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2021-05-02 14:48:49,375 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:48:49,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313136366] [2021-05-02 14:48:49,376 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:48:49,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032311781] [2021-05-02 14:48:49,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2032311781] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:48:49,376 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:48:49,376 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 14:48:49,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143329321] [2021-05-02 14:48:49,377 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 14:48:49,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:48:49,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 14:48:49,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-02 14:48:49,378 INFO L87 Difference]: Start difference. First operand 266 states and 316 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-02 14:48:53,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:48:53,688 INFO L93 Difference]: Finished difference Result 324 states and 404 transitions. [2021-05-02 14:48:53,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 14:48:53,689 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) Word has length 92 [2021-05-02 14:48:53,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:48:53,690 INFO L225 Difference]: With dead ends: 324 [2021-05-02 14:48:53,690 INFO L226 Difference]: Without dead ends: 318 [2021-05-02 14:48:53,691 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 82 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 94.1ms TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-05-02 14:48:53,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2021-05-02 14:48:53,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 280. [2021-05-02 14:48:53,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 167 states have (on average 1.1377245508982037) internal successors, (190), 173 states have internal predecessors, (190), 76 states have call successors, (76), 37 states have call predecessors, (76), 36 states have return successors, (74), 69 states have call predecessors, (74), 74 states have call successors, (74) [2021-05-02 14:48:53,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 340 transitions. [2021-05-02 14:48:53,724 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 340 transitions. Word has length 92 [2021-05-02 14:48:53,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:48:53,724 INFO L480 AbstractCegarLoop]: Abstraction has 280 states and 340 transitions. [2021-05-02 14:48:53,724 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-02 14:48:53,724 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 340 transitions. [2021-05-02 14:48:53,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-05-02 14:48:53,725 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:48:53,725 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:48:53,940 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-05-02 14:48:53,940 INFO L428 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:48:53,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:48:53,941 INFO L82 PathProgramCache]: Analyzing trace with hash 1451786998, now seen corresponding path program 13 times [2021-05-02 14:48:53,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:48:53,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915433623] [2021-05-02 14:48:53,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:48:53,949 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:48:53,949 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1207229763] [2021-05-02 14:48:53,949 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:48:54,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:48:54,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 46 conjunts are in the unsatisfiable core [2021-05-02 14:48:54,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:48:54,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:54,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:54,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:54,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:54,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:54,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:54,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:54,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:54,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:54,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:54,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:54,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:54,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:54,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:54,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:54,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:54,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:54,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:54,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:54,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:54,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:54,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:54,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:54,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:54,315 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 26 proven. 30 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2021-05-02 14:48:54,315 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:48:54,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915433623] [2021-05-02 14:48:54,315 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:48:54,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207229763] [2021-05-02 14:48:54,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1207229763] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:48:54,315 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:48:54,315 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 14:48:54,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905476169] [2021-05-02 14:48:54,316 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 14:48:54,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:48:54,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 14:48:54,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-05-02 14:48:54,316 INFO L87 Difference]: Start difference. First operand 280 states and 340 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2021-05-02 14:48:54,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:48:54,610 INFO L93 Difference]: Finished difference Result 304 states and 369 transitions. [2021-05-02 14:48:54,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 14:48:54,611 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) Word has length 92 [2021-05-02 14:48:54,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:48:54,612 INFO L225 Difference]: With dead ends: 304 [2021-05-02 14:48:54,612 INFO L226 Difference]: Without dead ends: 302 [2021-05-02 14:48:54,612 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 136.5ms TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-05-02 14:48:54,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2021-05-02 14:48:54,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 288. [2021-05-02 14:48:54,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 173 states have (on average 1.1329479768786128) internal successors, (196), 179 states have internal predecessors, (196), 76 states have call successors, (76), 39 states have call predecessors, (76), 38 states have return successors, (74), 69 states have call predecessors, (74), 74 states have call successors, (74) [2021-05-02 14:48:54,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 346 transitions. [2021-05-02 14:48:54,639 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 346 transitions. Word has length 92 [2021-05-02 14:48:54,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:48:54,640 INFO L480 AbstractCegarLoop]: Abstraction has 288 states and 346 transitions. [2021-05-02 14:48:54,640 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2021-05-02 14:48:54,640 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 346 transitions. [2021-05-02 14:48:54,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-05-02 14:48:54,641 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:48:54,641 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:48:54,858 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:48:54,858 INFO L428 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:48:54,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:48:54,859 INFO L82 PathProgramCache]: Analyzing trace with hash -87157341, now seen corresponding path program 14 times [2021-05-02 14:48:54,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:48:54,859 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888724438] [2021-05-02 14:48:54,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:48:54,865 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:48:54,866 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [963851165] [2021-05-02 14:48:54,866 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:48:54,912 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 14:48:54,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:48:54,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-02 14:48:54,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:48:54,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:54,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:54,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:54,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:54,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:54,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:54,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:54,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:55,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:55,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:55,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:55,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:55,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:55,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:55,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:55,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:55,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:55,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:55,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:55,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:55,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:55,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:55,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:55,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:55,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:55,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:55,141 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 28 proven. 33 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2021-05-02 14:48:55,141 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:48:55,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888724438] [2021-05-02 14:48:55,141 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:48:55,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963851165] [2021-05-02 14:48:55,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [963851165] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:48:55,142 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:48:55,142 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 14:48:55,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475694514] [2021-05-02 14:48:55,143 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 14:48:55,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:48:55,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 14:48:55,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-05-02 14:48:55,145 INFO L87 Difference]: Start difference. First operand 288 states and 346 transitions. Second operand has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 9 states have internal predecessors, (27), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2021-05-02 14:48:55,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:48:55,416 INFO L93 Difference]: Finished difference Result 328 states and 399 transitions. [2021-05-02 14:48:55,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 14:48:55,416 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 9 states have internal predecessors, (27), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) Word has length 97 [2021-05-02 14:48:55,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:48:55,418 INFO L225 Difference]: With dead ends: 328 [2021-05-02 14:48:55,418 INFO L226 Difference]: Without dead ends: 322 [2021-05-02 14:48:55,418 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 91.9ms TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-05-02 14:48:55,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2021-05-02 14:48:55,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 322. [2021-05-02 14:48:55,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 194 states have (on average 1.134020618556701) internal successors, (220), 200 states have internal predecessors, (220), 85 states have call successors, (85), 43 states have call predecessors, (85), 42 states have return successors, (83), 78 states have call predecessors, (83), 83 states have call successors, (83) [2021-05-02 14:48:55,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 388 transitions. [2021-05-02 14:48:55,442 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 388 transitions. Word has length 97 [2021-05-02 14:48:55,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:48:55,442 INFO L480 AbstractCegarLoop]: Abstraction has 322 states and 388 transitions. [2021-05-02 14:48:55,442 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 9 states have internal predecessors, (27), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2021-05-02 14:48:55,442 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 388 transitions. [2021-05-02 14:48:55,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-05-02 14:48:55,442 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:48:55,443 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:48:55,656 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-05-02 14:48:55,657 INFO L428 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:48:55,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:48:55,657 INFO L82 PathProgramCache]: Analyzing trace with hash 1963826657, now seen corresponding path program 15 times [2021-05-02 14:48:55,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:48:55,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439764457] [2021-05-02 14:48:55,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:48:55,663 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:48:55,663 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [909322273] [2021-05-02 14:48:55,663 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:48:55,749 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 14:48:55,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:48:55,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-02 14:48:55,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:49:01,964 WARN L205 SmtUtils]: Spent 4.02 s on a formula simplification that was a NOOP. DAG size: 31 [2021-05-02 14:49:01,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:01,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:01,992 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 71 proven. 29 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2021-05-02 14:49:01,992 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:49:01,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439764457] [2021-05-02 14:49:01,992 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:49:01,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909322273] [2021-05-02 14:49:01,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909322273] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:49:01,992 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:49:01,992 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 14:49:01,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55303591] [2021-05-02 14:49:01,993 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 14:49:01,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:49:01,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 14:49:01,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=87, Unknown=1, NotChecked=0, Total=110 [2021-05-02 14:49:01,993 INFO L87 Difference]: Start difference. First operand 322 states and 388 transitions. Second operand has 11 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 6 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-02 14:49:33,217 WARN L205 SmtUtils]: Spent 19.24 s on a formula simplification. DAG size of input: 48 DAG size of output: 43 [2021-05-02 14:49:43,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:49:43,146 INFO L93 Difference]: Finished difference Result 359 states and 449 transitions. [2021-05-02 14:49:43,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 14:49:43,146 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 6 states have call predecessors, (13), 4 states have call successors, (13) Word has length 97 [2021-05-02 14:49:43,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:49:43,148 INFO L225 Difference]: With dead ends: 359 [2021-05-02 14:49:43,148 INFO L226 Difference]: Without dead ends: 353 [2021-05-02 14:49:43,148 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 25382.6ms TimeCoverageRelationStatistics Valid=37, Invalid=144, Unknown=1, NotChecked=0, Total=182 [2021-05-02 14:49:43,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2021-05-02 14:49:43,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 345. [2021-05-02 14:49:43,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 207 states have (on average 1.1545893719806763) internal successors, (239), 213 states have internal predecessors, (239), 94 states have call successors, (94), 44 states have call predecessors, (94), 43 states have return successors, (92), 87 states have call predecessors, (92), 92 states have call successors, (92) [2021-05-02 14:49:43,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 425 transitions. [2021-05-02 14:49:43,177 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 425 transitions. Word has length 97 [2021-05-02 14:49:43,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:49:43,177 INFO L480 AbstractCegarLoop]: Abstraction has 345 states and 425 transitions. [2021-05-02 14:49:43,177 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 6 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-02 14:49:43,177 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 425 transitions. [2021-05-02 14:49:43,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-05-02 14:49:43,178 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:49:43,178 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:49:43,393 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-05-02 14:49:43,393 INFO L428 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:49:43,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:49:43,393 INFO L82 PathProgramCache]: Analyzing trace with hash 1451182689, now seen corresponding path program 16 times [2021-05-02 14:49:43,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:49:43,393 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920756676] [2021-05-02 14:49:43,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:49:43,398 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:49:43,398 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [117961413] [2021-05-02 14:49:43,398 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:49:43,439 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 14:49:43,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:49:43,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 64 conjunts are in the unsatisfiable core [2021-05-02 14:49:43,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:49:43,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:43,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:43,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:43,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:43,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:43,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:43,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:43,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:43,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:43,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:43,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:43,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:43,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:43,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:43,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:43,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:43,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:43,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:43,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:43,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:43,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:43,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:43,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:43,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:43,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:43,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:43,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:43,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:43,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:43,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:43,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:43,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:43,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:43,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:43,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:43,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:43,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:43,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:43,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:43,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:43,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:43,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:43,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:43,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:43,925 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 82 proven. 51 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2021-05-02 14:49:43,925 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:49:43,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920756676] [2021-05-02 14:49:43,925 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:49:43,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117961413] [2021-05-02 14:49:43,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117961413] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:49:43,925 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:49:43,925 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-05-02 14:49:43,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487767225] [2021-05-02 14:49:43,926 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-02 14:49:43,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:49:43,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-02 14:49:43,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-05-02 14:49:43,927 INFO L87 Difference]: Start difference. First operand 345 states and 425 transitions. Second operand has 16 states, 15 states have (on average 2.0) internal successors, (30), 12 states have internal predecessors, (30), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 8 states have call predecessors, (16), 6 states have call successors, (16) [2021-05-02 14:49:44,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:49:44,563 INFO L93 Difference]: Finished difference Result 383 states and 475 transitions. [2021-05-02 14:49:44,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 14:49:44,563 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 12 states have internal predecessors, (30), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 8 states have call predecessors, (16), 6 states have call successors, (16) Word has length 97 [2021-05-02 14:49:44,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:49:44,565 INFO L225 Difference]: With dead ends: 383 [2021-05-02 14:49:44,565 INFO L226 Difference]: Without dead ends: 373 [2021-05-02 14:49:44,565 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 288.7ms TimeCoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-05-02 14:49:44,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2021-05-02 14:49:44,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 355. [2021-05-02 14:49:44,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 214 states have (on average 1.1495327102803738) internal successors, (246), 221 states have internal predecessors, (246), 95 states have call successors, (95), 46 states have call predecessors, (95), 45 states have return successors, (93), 87 states have call predecessors, (93), 93 states have call successors, (93) [2021-05-02 14:49:44,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 434 transitions. [2021-05-02 14:49:44,596 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 434 transitions. Word has length 97 [2021-05-02 14:49:44,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:49:44,596 INFO L480 AbstractCegarLoop]: Abstraction has 355 states and 434 transitions. [2021-05-02 14:49:44,596 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 12 states have internal predecessors, (30), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 8 states have call predecessors, (16), 6 states have call successors, (16) [2021-05-02 14:49:44,596 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 434 transitions. [2021-05-02 14:49:44,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-05-02 14:49:44,597 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:49:44,597 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:49:44,800 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-05-02 14:49:44,800 INFO L428 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:49:44,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:49:44,800 INFO L82 PathProgramCache]: Analyzing trace with hash -792800609, now seen corresponding path program 4 times [2021-05-02 14:49:44,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:49:44,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666912712] [2021-05-02 14:49:44,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:49:44,805 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:49:44,805 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1709445132] [2021-05-02 14:49:44,805 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:49:44,844 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 14:49:44,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:49:44,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 54 conjunts are in the unsatisfiable core [2021-05-02 14:49:44,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:49:44,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:44,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:44,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:44,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:44,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:44,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:44,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:44,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:44,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:44,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:44,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:44,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:44,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:44,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:44,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:44,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:44,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:44,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:44,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:44,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:45,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:45,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:45,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:45,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:45,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:45,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:45,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:45,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:45,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:45,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:45,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:45,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:45,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:45,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:45,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:45,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:45,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:45,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:45,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:45,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:45,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:45,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:45,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:45,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:45,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:45,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:45,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:45,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:45,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:45,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:45,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:45,303 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 61 proven. 72 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2021-05-02 14:49:45,304 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:49:45,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666912712] [2021-05-02 14:49:45,304 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:49:45,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709445132] [2021-05-02 14:49:45,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1709445132] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:49:45,304 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:49:45,304 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-02 14:49:45,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153973215] [2021-05-02 14:49:45,304 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-02 14:49:45,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:49:45,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-02 14:49:45,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-05-02 14:49:45,305 INFO L87 Difference]: Start difference. First operand 355 states and 434 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 13 states have internal predecessors, (30), 6 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 8 states have call predecessors, (16), 6 states have call successors, (16) [2021-05-02 14:49:45,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:49:45,814 INFO L93 Difference]: Finished difference Result 392 states and 495 transitions. [2021-05-02 14:49:45,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 14:49:45,825 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 13 states have internal predecessors, (30), 6 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 8 states have call predecessors, (16), 6 states have call successors, (16) Word has length 97 [2021-05-02 14:49:45,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:49:45,827 INFO L225 Difference]: With dead ends: 392 [2021-05-02 14:49:45,827 INFO L226 Difference]: Without dead ends: 383 [2021-05-02 14:49:45,828 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 82 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 237.3ms TimeCoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-05-02 14:49:45,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2021-05-02 14:49:45,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 383. [2021-05-02 14:49:45,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383 states, 229 states have (on average 1.1572052401746724) internal successors, (265), 236 states have internal predecessors, (265), 107 states have call successors, (107), 47 states have call predecessors, (107), 46 states have return successors, (105), 99 states have call predecessors, (105), 105 states have call successors, (105) [2021-05-02 14:49:45,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 477 transitions. [2021-05-02 14:49:45,863 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 477 transitions. Word has length 97 [2021-05-02 14:49:45,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:49:45,863 INFO L480 AbstractCegarLoop]: Abstraction has 383 states and 477 transitions. [2021-05-02 14:49:45,863 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 13 states have internal predecessors, (30), 6 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 8 states have call predecessors, (16), 6 states have call successors, (16) [2021-05-02 14:49:45,863 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 477 transitions. [2021-05-02 14:49:45,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-05-02 14:49:45,864 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:49:45,864 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:49:46,079 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-05-02 14:49:46,080 INFO L428 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:49:46,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:49:46,080 INFO L82 PathProgramCache]: Analyzing trace with hash -1283771014, now seen corresponding path program 17 times [2021-05-02 14:49:46,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:49:46,080 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439461638] [2021-05-02 14:49:46,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:49:46,094 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:49:46,094 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [779076031] [2021-05-02 14:49:46,094 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:49:47,616 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-05-02 14:49:47,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:49:47,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-02 14:49:47,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:49:47,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:47,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:47,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:47,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:47,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:47,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:47,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:47,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:47,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:47,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:47,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:47,868 INFO L134 CoverageAnalysis]: Checked inductivity of 356 backedges. 24 proven. 44 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2021-05-02 14:49:47,869 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:49:47,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439461638] [2021-05-02 14:49:47,869 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:49:47,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779076031] [2021-05-02 14:49:47,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779076031] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:49:47,869 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:49:47,869 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 14:49:47,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161744573] [2021-05-02 14:49:47,869 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 14:49:47,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:49:47,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 14:49:47,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-05-02 14:49:47,870 INFO L87 Difference]: Start difference. First operand 383 states and 477 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 6 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 5 states have call predecessors, (17), 5 states have call successors, (17) [2021-05-02 14:49:48,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:49:48,089 INFO L93 Difference]: Finished difference Result 399 states and 495 transitions. [2021-05-02 14:49:48,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 14:49:48,090 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 6 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 5 states have call predecessors, (17), 5 states have call successors, (17) Word has length 105 [2021-05-02 14:49:48,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:49:48,091 INFO L225 Difference]: With dead ends: 399 [2021-05-02 14:49:48,092 INFO L226 Difference]: Without dead ends: 397 [2021-05-02 14:49:48,092 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 72.0ms TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-02 14:49:48,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2021-05-02 14:49:48,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 393. [2021-05-02 14:49:48,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 236 states have (on average 1.152542372881356) internal successors, (272), 244 states have internal predecessors, (272), 108 states have call successors, (108), 49 states have call predecessors, (108), 48 states have return successors, (106), 99 states have call predecessors, (106), 106 states have call successors, (106) [2021-05-02 14:49:48,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 486 transitions. [2021-05-02 14:49:48,126 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 486 transitions. Word has length 105 [2021-05-02 14:49:48,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:49:48,127 INFO L480 AbstractCegarLoop]: Abstraction has 393 states and 486 transitions. [2021-05-02 14:49:48,127 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 6 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 5 states have call predecessors, (17), 5 states have call successors, (17) [2021-05-02 14:49:48,127 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 486 transitions. [2021-05-02 14:49:48,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-05-02 14:49:48,127 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:49:48,128 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:49:48,334 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-05-02 14:49:48,335 INFO L428 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:49:48,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:49:48,335 INFO L82 PathProgramCache]: Analyzing trace with hash -901611014, now seen corresponding path program 18 times [2021-05-02 14:49:48,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:49:48,335 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812103639] [2021-05-02 14:49:48,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:49:48,339 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:49:48,340 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [203683884] [2021-05-02 14:49:48,340 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:49:49,220 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-02 14:49:49,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:49:49,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-02 14:49:49,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:49:49,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:49,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:49,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:49,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:49,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:49,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:49,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:49,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:49,408 INFO L134 CoverageAnalysis]: Checked inductivity of 356 backedges. 67 proven. 53 refuted. 0 times theorem prover too weak. 236 trivial. 0 not checked. [2021-05-02 14:49:49,409 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:49:49,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812103639] [2021-05-02 14:49:49,409 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:49:49,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203683884] [2021-05-02 14:49:49,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [203683884] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:49:49,409 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:49:49,409 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 14:49:49,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201583324] [2021-05-02 14:49:49,409 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 14:49:49,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:49:49,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 14:49:49,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-02 14:49:49,410 INFO L87 Difference]: Start difference. First operand 393 states and 486 transitions. Second operand has 8 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2021-05-02 14:49:51,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:49:51,550 INFO L93 Difference]: Finished difference Result 411 states and 500 transitions. [2021-05-02 14:49:51,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 14:49:51,550 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 105 [2021-05-02 14:49:51,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:49:51,552 INFO L225 Difference]: With dead ends: 411 [2021-05-02 14:49:51,552 INFO L226 Difference]: Without dead ends: 409 [2021-05-02 14:49:51,552 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 96 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 48.4ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-05-02 14:49:51,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2021-05-02 14:49:51,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 402. [2021-05-02 14:49:51,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 245 states have (on average 1.146938775510204) internal successors, (281), 252 states have internal predecessors, (281), 105 states have call successors, (105), 52 states have call predecessors, (105), 51 states have return successors, (103), 97 states have call predecessors, (103), 103 states have call successors, (103) [2021-05-02 14:49:51,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 489 transitions. [2021-05-02 14:49:51,592 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 489 transitions. Word has length 105 [2021-05-02 14:49:51,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:49:51,592 INFO L480 AbstractCegarLoop]: Abstraction has 402 states and 489 transitions. [2021-05-02 14:49:51,592 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2021-05-02 14:49:51,592 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 489 transitions. [2021-05-02 14:49:51,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-05-02 14:49:51,593 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:49:51,593 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:49:51,798 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:49:51,799 INFO L428 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:49:51,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:49:51,799 INFO L82 PathProgramCache]: Analyzing trace with hash -1750450403, now seen corresponding path program 19 times [2021-05-02 14:49:51,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:49:51,799 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209954109] [2021-05-02 14:49:51,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:49:51,806 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:49:51,806 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [200053821] [2021-05-02 14:49:51,806 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:49:51,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:49:51,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 51 conjunts are in the unsatisfiable core [2021-05-02 14:49:51,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:49:51,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:51,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:51,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:51,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:51,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:51,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:51,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:51,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:51,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:51,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:51,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:51,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:51,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:51,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:52,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:52,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:52,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:52,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:52,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:52,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:52,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:52,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:52,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:52,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:52,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:52,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:52,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:52,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:52,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:52,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:52,232 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 32 proven. 51 refuted. 0 times theorem prover too weak. 327 trivial. 0 not checked. [2021-05-02 14:49:52,233 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:49:52,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209954109] [2021-05-02 14:49:52,233 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:49:52,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200053821] [2021-05-02 14:49:52,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [200053821] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:49:52,233 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:49:52,233 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-02 14:49:52,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221021307] [2021-05-02 14:49:52,233 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 14:49:52,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:49:52,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 14:49:52,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-05-02 14:49:52,234 INFO L87 Difference]: Start difference. First operand 402 states and 489 transitions. Second operand has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 11 states have internal predecessors, (30), 7 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) [2021-05-02 14:49:52,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:49:52,667 INFO L93 Difference]: Finished difference Result 434 states and 528 transitions. [2021-05-02 14:49:52,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 14:49:52,667 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 11 states have internal predecessors, (30), 7 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) Word has length 110 [2021-05-02 14:49:52,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:49:52,669 INFO L225 Difference]: With dead ends: 434 [2021-05-02 14:49:52,669 INFO L226 Difference]: Without dead ends: 432 [2021-05-02 14:49:52,669 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 196.2ms TimeCoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-05-02 14:49:52,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2021-05-02 14:49:52,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 428. [2021-05-02 14:49:52,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 428 states, 262 states have (on average 1.1488549618320612) internal successors, (301), 268 states have internal predecessors, (301), 110 states have call successors, (110), 56 states have call predecessors, (110), 55 states have return successors, (108), 103 states have call predecessors, (108), 108 states have call successors, (108) [2021-05-02 14:49:52,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 519 transitions. [2021-05-02 14:49:52,706 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 519 transitions. Word has length 110 [2021-05-02 14:49:52,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:49:52,706 INFO L480 AbstractCegarLoop]: Abstraction has 428 states and 519 transitions. [2021-05-02 14:49:52,706 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 11 states have internal predecessors, (30), 7 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) [2021-05-02 14:49:52,706 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 519 transitions. [2021-05-02 14:49:52,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-05-02 14:49:52,707 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:49:52,707 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:49:52,920 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-05-02 14:49:52,921 INFO L428 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:49:52,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:49:52,921 INFO L82 PathProgramCache]: Analyzing trace with hash 805225117, now seen corresponding path program 20 times [2021-05-02 14:49:52,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:49:52,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550168946] [2021-05-02 14:49:52,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:49:52,926 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:49:52,926 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1303434485] [2021-05-02 14:49:52,926 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:49:52,975 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 14:49:52,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:49:52,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 70 conjunts are in the unsatisfiable core [2021-05-02 14:49:52,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:49:53,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:53,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:53,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:53,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:53,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:53,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:53,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:53,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:53,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:53,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:53,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:53,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:53,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:53,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:53,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:53,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:53,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:53,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:53,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:53,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:53,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:53,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:53,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:53,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:53,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:53,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:53,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:53,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:53,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:53,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:53,364 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 104 proven. 69 refuted. 0 times theorem prover too weak. 237 trivial. 0 not checked. [2021-05-02 14:49:53,365 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:49:53,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550168946] [2021-05-02 14:49:53,365 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:49:53,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303434485] [2021-05-02 14:49:53,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1303434485] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:49:53,365 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:49:53,365 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-02 14:49:53,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127156580] [2021-05-02 14:49:53,365 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 14:49:53,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:49:53,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 14:49:53,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-05-02 14:49:53,366 INFO L87 Difference]: Start difference. First operand 428 states and 519 transitions. Second operand has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 12 states have internal predecessors, (33), 7 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) [2021-05-02 14:49:53,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:49:53,846 INFO L93 Difference]: Finished difference Result 470 states and 571 transitions. [2021-05-02 14:49:53,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 14:49:53,847 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 12 states have internal predecessors, (33), 7 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) Word has length 110 [2021-05-02 14:49:53,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:49:53,849 INFO L225 Difference]: With dead ends: 470 [2021-05-02 14:49:53,849 INFO L226 Difference]: Without dead ends: 468 [2021-05-02 14:49:53,849 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 94 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 221.0ms TimeCoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-05-02 14:49:53,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2021-05-02 14:49:53,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 454. [2021-05-02 14:49:53,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 279 states have (on average 1.146953405017921) internal successors, (320), 284 states have internal predecessors, (320), 115 states have call successors, (115), 60 states have call predecessors, (115), 59 states have return successors, (113), 109 states have call predecessors, (113), 113 states have call successors, (113) [2021-05-02 14:49:53,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 548 transitions. [2021-05-02 14:49:53,889 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 548 transitions. Word has length 110 [2021-05-02 14:49:53,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:49:53,889 INFO L480 AbstractCegarLoop]: Abstraction has 454 states and 548 transitions. [2021-05-02 14:49:53,889 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 12 states have internal predecessors, (33), 7 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) [2021-05-02 14:49:53,889 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 548 transitions. [2021-05-02 14:49:53,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-05-02 14:49:53,890 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:49:53,890 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:49:54,100 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-05-02 14:49:54,101 INFO L428 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:49:54,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:49:54,101 INFO L82 PathProgramCache]: Analyzing trace with hash -2103538785, now seen corresponding path program 21 times [2021-05-02 14:49:54,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:49:54,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290515726] [2021-05-02 14:49:54,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:49:54,105 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:49:54,105 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [5971973] [2021-05-02 14:49:54,106 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true